Stepper motor assistance

[cmjb13]

I have an IGT Price is Right slot wheel from 2001.

http://home.comcast.net/~cmjb13/wheel1.jpg
http://home.comcast.net/~cmjb13/wheel2.jpg

A friend of mine was able to get the lights to chase and the wheel to spin using a stepper motor controller. However, he is unable to make the wheel slow down or stop (aside from yanking the power).  He says using the encoder, this will not be possible. I'm not trying to get this to work as part of the slot machine, rather just on it's own.

I throw it out to people that know about this stuff more than me.

Is is possible? Or can you recommend another way to accomplish this?

Any help is appreciated.

Thank you in advance.

[Retro tech repair]

most likely you will have to have a custom board made to drive the lights and stepper as the igt board is probably controlled over netplex.